# 查询时间序列
#### 场景描述
本章以查询一个节点的CPU使用率时间序列为例。
#### 涉及的基本信息
查询时间序列前，需要确定节点的ID和集群ID的值，节点ID值可以在ECS的dimensions中查看，集群ID值可以在CCE的"集群管理"页面，基本信息的dimensions中查看。
CPU使用率metric_name可以在[主机指标](https://support.huaweicloud.com/productdesc-aom2/aom_01_0022.html)中查看，集群ID和节点ID各自对应的name可以在[主机指标-维度](https://support.huaweicloud.com/productdesc-aom2/aom_01_0025.html)中查看，namespace可以在[表4 QuerySeriesOptionParam](https://support.huaweicloud.com/api-aom/ListSeries.html#ListSeries__request_QuerySeriesOptionParam)中查看。
#### 查询时间序列
- 接口相关信息 URI格式：POST /v2/{project_id}/series
  
- 请求示例 POST https://{aom_endpoint}/v2/{project_id}/series
  {aom_endpoint}信息请从[地区和终端节点](https://console.huaweicloud.com/apiexplorer/#/endpoint/AOM)获取。
  Body：
  ```
  {
      "series": [
          {
              "namespace": "PAAS.NODE",
              "metric_name": "aom_node_cpu_usage",
              "dimensions":[
                  {
                      "name":"clusterId",
                      "value":"4fae3587-0202-11eb-9ba9-0255ac100b02"
                  },
                  {
                      "name":"hostID",
                      "value":"4100f512-c4e9-4b65-b0dd-2b94ea5e1a84"
                  }
              ]
          }
      ]
  }
  ```
  

- 响应示例
  ```
  {
  "meta_data": {
  "count": 0,
  "offset": 0,
  "total": 1,
  "nextToken": 9007148492074133276
  },
  "series": [{
  "namespace": "PAAS.NODE",
  "metric_name": "cpuUsage",
  "unit": "Percent",
  "dimensions": [{
  "name": "clusterId",
  "value": "4fae3587-0202-11eb-9ba9-0255ac100b02"
  },
  {
  "name": "clusterName",
  "value": "testdiskrate"
  },
  {
  "name": "hostID",
  "value": "4100f512-c4e9-4b65-b0dd-2b94ea5e1a84"
  },
  {
  "name": "nameSpace",
  "value": "default"
  },
  {
  "name": "nodeIP",
  "value": "192.168.0.123"
  },
  {
  "name": "nodeName",
  "value": "192.168.0.123"
  }]
  }]
  }
  ```